TY  - BOOK
AU  - Mitchell,David
TI  - An introduction to logic
U1  - 160 M681A 1972 
PY  - 1972///
CY  - Lodnon
PB  - Hutchinson university library
KW  - Logic (Reasoning)
KW  - Counterfactuals
KW  - Logic
N1  - Index
ER  -